Title: 2.2.0 | Page 2 of 4 | Developer.WordPress.org --- # New and updated in 2.2.0 Functions Hooks Classes Methods * hook[comment_feed_join](https://developer.wordpress.org/reference/hooks/comment_feed_join/) * Filters the JOIN clause of the comments feed query before sending. * Used by [1 function](https://developer.wordpress.org/reference/hooks/comment_feed_join/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_feed_join/#uses) | Source: [wp-includes/class-wp-query.php:2831](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-query.php#L2831-L2831) * hook[comment_feed_where](https://developer.wordpress.org/reference/hooks/comment_feed_where/) * Filters the WHERE clause of the comments feed query before sending. * Used by [1 function](https://developer.wordpress.org/reference/hooks/comment_feed_where/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_feed_where/#uses) | Source: [wp-includes/class-wp-query.php:2841](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-query.php#L2841-L2841) * hook[comment_feed_groupby](https://developer.wordpress.org/reference/hooks/comment_feed_groupby/) * Filters the GROUP BY clause of the comments feed query before sending. * Used by [1 function](https://developer.wordpress.org/reference/hooks/comment_feed_groupby/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_feed_groupby/#uses) | Source: [wp-includes/class-wp-query.php:2851](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-query.php#L2851-L2851) * function[have_comments()](https://developer.wordpress.org/reference/functions/have_comments/) * Determines whether current WordPress query has comments to loop over. * Used by [0 functions](https://developer.wordpress.org/reference/functions/have_comments/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/have_comments/#uses) | Source: [wp-includes/query.php:1021](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/query.php#L1021-L1029) * function[the_comment()](https://developer.wordpress.org/reference/functions/the_comment/) * Iterate comment index in the comment loop. * Used by [0 functions](https://developer.wordpress.org/reference/functions/the_comment/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/the_comment/#uses) | Source: [wp-includes/query.php:1038](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/query.php#L1038-L1046) * function[set_query_var()](https://developer.wordpress.org/reference/functions/set_query_var/) * Sets the value of a query variable in the WP_Query class. * Used by [2 functions](https://developer.wordpress.org/reference/functions/set_query_var/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/set_query_var/#uses) | Source: [wp-includes/query.php:74](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/query.php#L74-L77) * function[wp_localize_script()](https://developer.wordpress.org/reference/functions/wp_localize_script/) * Localizes a script. * Used by [12 functions](https://developer.wordpress.org/reference/functions/wp_localize_script/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_localize_script/#uses) | Source: [wp-includes/functions.wp-scripts.php:320](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.wp-scripts.php#L320-L324) * function[wp_maybe_load_widgets()](https://developer.wordpress.org/reference/functions/wp_maybe_load_widgets/) * Determines if Widgets library should be loaded. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_maybe_load_widgets/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_maybe_load_widgets/#uses) | Source: [wp-includes/functions.php:5437](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L5437-L5456) * function[wp_widgets_add_menu()](https://developer.wordpress.org/reference/functions/wp_widgets_add_menu/) * Appends the Widgets menu to the themes main menu. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_widgets_add_menu/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/wp_widgets_add_menu/#uses) | Source: [wp-includes/functions.php:5466](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L5466-L5481) * function[wp_ob_end_flush_all()](https://developer.wordpress.org/reference/functions/wp_ob_end_flush_all/) * Flushes all output buffers for PHP 5.2. * Used by [3 functions](https://developer.wordpress.org/reference/functions/wp_ob_end_flush_all/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/wp_ob_end_flush_all/#uses) | Source: [wp-includes/functions.php:5490](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L5490-L5495) * function[_config_wp_home()](https://developer.wordpress.org/reference/functions/_config_wp_home/) * Retrieves the WordPress home page URL. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_config_wp_home/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/_config_wp_home/#uses) | Source: [wp-includes/functions.php:4726](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L4726-L4731) * function[_config_wp_siteurl()](https://developer.wordpress.org/reference/functions/_config_wp_siteurl/) * Retrieves the WordPress site URL. * Used by [0 functions](https://developer.wordpress.org/reference/functions/_config_wp_siteurl/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/_config_wp_siteurl/#uses) | Source: [wp-includes/functions.php:4748](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L4748-L4753) * function[smilies_init()](https://developer.wordpress.org/reference/functions/smilies_init/) * Converts smiley code to the icon graphic file equivalent. * Used by [0 functions](https://developer.wordpress.org/reference/functions/smilies_init/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/smilies_init/#uses) | Source: [wp-includes/functions.php:4839](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L4839-L4947) * function[wp_parse_args()](https://developer.wordpress.org/reference/functions/wp_parse_args/) * Merges user defined arguments into defaults array. * Used by [210 functions](https://developer.wordpress.org/reference/functions/wp_parse_args/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/wp_parse_args/#uses) | Source: [wp-includes/functions.php:4963](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L4963-L4976) * hook[status_header](https://developer.wordpress.org/reference/hooks/status_header/) * Filters an HTTP status header. * Used by [1 function](https://developer.wordpress.org/reference/hooks/status_header/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/status_header/#uses) | Source: [wp-includes/functions.php:1481](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/functions.php#L1481-L1481) * hook[widgets_init](https://developer.wordpress.org/reference/hooks/widgets_init/) * Fires after all default WordPress widgets have been registered. * Used by [1 function](https://developer.wordpress.org/reference/hooks/widgets_init/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/widgets_init/#uses) | Source: [wp-includes/widgets.php:1884](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets.php#L1884-L1884) * function[wp_widgets_init()](https://developer.wordpress.org/reference/functions/wp_widgets_init/) * Registers all of the default WordPress widgets on startup. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_widgets_init/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/wp_widgets_init/#uses) | Source: [wp-includes/widgets.php:1834](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/widgets.php#L1834-L1885) * function[get_post_comments_feed_link()](https://developer.wordpress.org/reference/functions/get_post_comments_feed_link/) * Retrieves the permalink for the post comments feed. * Used by [5 functions](https://developer.wordpress.org/reference/functions/get_post_comments_feed_link/#used-by) | Uses [12 functions](https://developer.wordpress.org/reference/functions/get_post_comments_feed_link/#uses) | Source: [wp-includes/link-template.php:745](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L745-L821) * hook[user_trailingslashit](https://developer.wordpress.org/reference/hooks/user_trailingslashit/) * Filters the trailing-slashed string, depending on whether the site is set to use trailing slashes. * Used by [1 function](https://developer.wordpress.org/reference/hooks/user_trailingslashit/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/user_trailingslashit/#uses) | Source: [wp-includes/link-template.php:65](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L65-L65) * function[user_trailingslashit()](https://developer.wordpress.org/reference/functions/user_trailingslashit/) * Retrieves a trailing-slashed string if the site is set for adding trailing slashes. * Used by [28 functions](https://developer.wordpress.org/reference/functions/user_trailingslashit/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/user_trailingslashit/#uses) | Source: [wp-includes/link-template.php:47](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/link-template.php#L47-L66) * hook[comment_atom_entry](https://developer.wordpress.org/reference/hooks/comment_atom_entry/) * Fires at the end of each Atom comment feed item. * Used by [0 functions](https://developer.wordpress.org/reference/hooks/comment_atom_entry/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/comment_atom_entry/#uses) | Source: [wp-includes/feed-atom-comments.php:141](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed-atom-comments.php#L141-L141) * function[html_type_rss()](https://developer.wordpress.org/reference/functions/html_type_rss/) * Displays the HTML type based on the blog setting. * Used by [0 functions](https://developer.wordpress.org/reference/functions/html_type_rss/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/html_type_rss/#uses) | Source: [wp-includes/feed.php:451](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L451-L459) * hook[rss_enclosure](https://developer.wordpress.org/reference/hooks/rss_enclosure/) * Filters the RSS enclosure HTML link tag for the current post. * Used by [1 function](https://developer.wordpress.org/reference/hooks/rss_enclosure/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/rss_enclosure/#uses) | Source: [wp-includes/feed.php:500](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L500-L500) * function[atom_enclosure()](https://developer.wordpress.org/reference/functions/atom_enclosure/) * Displays the atom enclosure for the current post. * Used by [0 functions](https://developer.wordpress.org/reference/functions/atom_enclosure/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/atom_enclosure/#uses) | Source: [wp-includes/feed.php:519](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L519-L569) * hook[atom_enclosure](https://developer.wordpress.org/reference/hooks/atom_enclosure/) * Filters the atom enclosure HTML link tag for the current post. * Used by [1 function](https://developer.wordpress.org/reference/hooks/atom_enclosure/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/atom_enclosure/#uses) | Source: [wp-includes/feed.php:565](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L565-L565) * hook[get_bloginfo_rss](https://developer.wordpress.org/reference/hooks/get_bloginfo_rss/) * Filters the bloginfo for use in RSS feeds. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_bloginfo_rss/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_bloginfo_rss/#uses) | Source: [wp-includes/feed.php:40](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L40-L40) * function[get_wp_title_rss()](https://developer.wordpress.org/reference/functions/get_wp_title_rss/) * Retrieves the blog title for the feed title. * Used by [2 functions](https://developer.wordpress.org/reference/functions/get_wp_title_rss/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/get_wp_title_rss/#uses) | Source: [wp-includes/feed.php:103](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L103-L119) * hook[get_wp_title_rss](https://developer.wordpress.org/reference/hooks/get_wp_title_rss/) * Filters the blog title for use as the feed title. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_wp_title_rss/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_wp_title_rss/#uses) | Source: [wp-includes/feed.php:118](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L118-L118) * function[wp_title_rss()](https://developer.wordpress.org/reference/functions/wp_title_rss/) * Displays the blog title for display of the feed title. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_title_rss/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/wp_title_rss/#uses) | Source: [wp-includes/feed.php:129](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L129-L147) * hook[wp_title_rss](https://developer.wordpress.org/reference/hooks/wp_title_rss/) * Filters the blog title for display of the feed title. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_title_rss/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_title_rss/#uses) | Source: [wp-includes/feed.php:146](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/feed.php#L146-L146) [Previous Page](https://developer.wordpress.org/reference/since/2.2.0/?output_format=md) [1](https://developer.wordpress.org/reference/since/2.2.0/?output_format=md) 2 [3](https://developer.wordpress.org/reference/since/2.2.0/page/3/?output_format=md) [4](https://developer.wordpress.org/reference/since/2.2.0/page/4/?output_format=md) [Next Page](https://developer.wordpress.org/reference/since/2.2.0/page/3/?output_format=md)